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Full text of "The Morphology And Evolution Of The Apes And Man"

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compares the physiological actions as similar to those in a club-foot of the varus variety. In the Gorilla the bones resemble those in Man more than do those of the other Apes, but still they deviate from the human state. And Owen (122^ has compared them as follows : —
1.  The calcaneurn is longer and more slender than in
2.  The   lower   surface   of   the   calcaneum   is   smooth,
narrow, and longitudinally more concave. 8. The groove for the flexor tendons is wider.
4.  The cuboid al surface is farther from the outer surface
of the bone.
5.  The navicular is wider transversely.
6.  The entocuneiform is not so long, and it has a convex
articulation for the hallux; the corresponding surface is flat in Man.
7.  The metatarsal of the hallus is as long as in Man, but
the proximal articular surface is more concave, and the distal one is more convex.
8.  The proximal phalanx of the hallux is as long as, and
the distal phalanx is smaller than in Man.
9.   The remaining metatarsals are longer and stronger
than in Man, the first and second phalanges are larger and more bent, and the ungual phalanges are longer and narrower than in Man.
In all Siiniidae the milk dentition consists of twenty teeth, but the permanent dentition consists of thirty-two teeth. The respective dental formulae are : —
Milk dentition         ......    If 0} PMg Mf
Permanent dentition          ...    IŁ C* PMf
—    j.        .2
The incisor teeth are small and procumbent, with chisel-like cutting edges.    The upper central incisors are